Justin Cooney

Web Development Tips and Examples

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I am a Senior Applications Programmer / Analyst with years of experience developing enterprise solutions using the Microsoft technology stack including C#, VB.NET, ASP.NET, AJAX, IIS and SQL Server. I specialize in Web application development with a focus on building secure systems, integrating applications, and designing robust database structures.

Author: Justin Cooney

  • Regular Expressions: What are the best Regular Expression testing tools?

    Personally, I love Regular Expressions. They are incredibly useful and can quickly turn a task that would take many lines of code into a single statement. They are perfect for text manipulation and forms processing & validation. In general they simplify the everyday coding lives of developers world-wide. However, Regular Expressions do come with a…

  • ASP.NET DropDownList: Set the Selected List Item

    I encountered a quirk today with pre-selecting a list item in the code-behind for a data-bound dropdown list during both the Page.Load and Page.PreRender events. I could set the selected value, but I could not check the list to see if the value that I wanted to select is actually available for selection. This is…

  • VB.NET: Date & Time Custom Formatting

    Often I find that I need to display a date and/or time in a specific format. Luckily VB.NET provides many options to adjust how a date is rendered as a string. Today, for example, I was working on a Web-based report that can be exported as an Excel file. As part of the process I…